Electric water heater



y 14, 1931- R.W. LINVILLE 1,814,319

ELECTRI 0 WATER HEATER Filed Oct. 21, 1929 Patented July 14, 1931 UNITED STATES PATENT OFFICE ROBERT W. LINVILLE, OF SAN FERNANDO, CALIFORNIA, ASSIGNOR OF THIRTY PER CENT T IRVING S. WATSON, OF BURBANK, CALIFORNIA ELECTRIC WATER HEATER Application filed October 21, 1929.

This invention relates to heating apparatus more particularly to electric water heaters.

The object of this invention is to provide an electric water heater capable of heating a large volume of water with a minimum consumption of electric current.

Other objects and advantages will be apparent from the following description,

to reference being had to the accompanying drawings, in which:

Fig. 1 is a horizontal sectional View of the heater taken on line 11 of Fig. 2;

Fig. is a vertical sectional View taken on line 22 of Fig. 1;

Fig. 3 is an electrical diagram of the heating elements.

Referring more specifically to the drawings, 1O designates a casing preferably of cylindrical shape in which is mounted a pipe coil 12 through which the water to be heated circulates, the inlet and outlet 13 and 14 respectively extending through closure plates 15 and 16.

The heater is preferably mounted in a vertical position as shown in the drawings in order that a circulation of water will be induced through the coil which may be connected through pipe lines to a storage tank (not shown) although water may be continuously drawn through the coil if desired.

Heating elements 18 consisting of resistance wire wound on cores 19 of refractory material forming coils 20 are arranged in circular formation as shown in Fig. 1 and are mounted on brackets 21 secured to a. circular wall 22 having openings 23 therein, the terminals of said coils being connected to conducting rings 24 and 25 which in turn are connected by conductors 26 to binding posts 27 mounted on the plates 15 and 16.

Additional heat to that generated by the elements 18 is produced by resistance coils 28 and 30, the coil 28 being wound on the circular wall 22 and the coil 30 wound on a core 32 encircling a tubular member 34 positioned between the closure plates.

From the foregoing it will be seen that by the arrangement of the heating elements Serial No. 401,059.

a large amount of heat is generated within a comparatively small area, thereby providing means for heating a large volume of water continuously.

Although the heating elements above de scribed are capable of producing a large amount of heat it has been found by experimenting the effectiveness may be still further increased by providing electrodes to produce an are arranged as follows:

A plurality of electrodes 40 and 41 are positioned between the heating elements, the upper ends of which are spaced apart as indicated at 44 to produce an arc. The lower ends of the electrodes are mounted in blocks 42 formed of insulation which are secured to the plate 16 by screws 43, the electrodes being energized through conducgors 46 and 47 connected to the rings 24 and The elements above described may be energized by alternating or direct current, hence the usual lamp socket current may be employed.

While the heater is adapted to heat water passing through the coil, it may be immersed in water or utilized as an air heater.

I claim:

1. An electric water heater comprising a cylindrical casing, a resistance coil mounted in the center of said casing, a plurality of resistance coils arranged in circular formation Within said cylindrical casing, a wall encircling said plurality of resistance coils, a second resistance coil wound on said circular wall, and a pipe coil encircling said circular wall.

2. An electric water heater comprising a cylindrical casing, a circular wall disposed in said casing, a tubular member disposed in said circular wall, said cylindrical casing, circular wall and tubular member being concentrically arranged, closure plates connected to the opposite ends of said cylindrical casing and tubular member, a resistance coil wound on said circular wall, a core encircling said tubular member, a resistance coil wound on said core, a plurality of resistance coils disposed between said circular wall and tubular member, and a pipe coil encircling said cylindrical wall, the opposite ends there of extending through openings formed in said closure plates.

3. An electric Water heater comprising a V cylindrical casing, a circular Wall disposed in said casing, a tubular member disposed in said circular Wall, said cylindrical casing, circular Wall and tubular member being concentrically arranged, closure plates connected t'o the opposite ends of said cylindrical casingand tubular member, a resistance coil Wound on said circular Wall, a core encircling said tubular member, a resistance coil wound on said core, a plurality of resistance coils disposed between said circular wall and tubular member, a plurality of pairs of electrodes for producing an arc disposed'between said circular Wall and tubular member, and a pipe coil encircling said cylindrical Wall, the opposite ends thereof extending through openings formed in said closure plates.

In testimony whereof I afiix my signature.

ROBERT W. LIN'VILLE. 

